2003 Peugeot 307 power steering issues

First thing I would check would be the power steering pump fuse

Peugeot 307 (2001 – 2004) – fuse box diagram
Year of production: 2001, 2002, 2003, 2004

Fascia fuses
Peugeot 307 - fuse box - fascia
Peugeot 307 – fuse box – fascia
Fuse Ampere rating [A] Functions
1 10 Rear fog lamp
2 15 Rear screen wiper
4 15 Front electric window/sunroof
5 15 Rear brake light including trailer
7 20 Rear courtesy light, front courtesy light, map readers – Lighter – Glove box lighting
Engine compartment fuses fuse box
Peugeot 307 - fuse box - engine compartment
Peugeot 307 – fuse box – engine compartment
Fuse Ampere rating [A] Functions
1 10 Automatic gearbox reversing lights switch – Automatic gearbox starting inhibitor relay control – Manual gearbox reversing lights switch – Vehicle speed sensor – Pre-heat control unit – Water in diesel sensor – DW air flow sensor
2 15 Canister solenoid valve – Fuel pump
3 10 Power steering control unit – ABS or ESP control unit
4 10 Injection control unit – Fan unit relay control – Additional heating relay control – Automatic gearbox control unit – Automatic gearbox sequential control – Automatic gearbox shiftlock relay.
5 15 Particulate emission filter control unit
6 15 Front fog lamps
7 20 Headlamp wash pump
8 20 Fan unit relay control – Injection control unit supply
9 15 Left dipped beam
10 15 Right dipped beam
11 10 Left main beam
12 10 Right main beam
13 15 Horn
14 10 Front and rear headlamps wash pump
15 30 Oxygen sensors – Exhaust gas recirculation solenoid valve – Ignition coil – Diesel high pressure regulator – Injectors supply (petrol)
16 40 Petrol engine air pump with automatic gearbox
17 30 Low/high speed front wiper
18 40 Air conditioning blower
Maxi – fuse table
Fuse Ampere rating [A] Functions
1 30 Fan unit
2 30 ESP/ABS pump motor
3 30 ESP/ABS solenoid valves
4 60 Built-in Systems Interface supply
5 70 Built-in Systems Interface supply
6 20 Heated seats
7 30 Ignition switch, power
8 70 Power steering electro-pump unit